From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E0B382AD32; Tue, 26 Aug 2025 14:41:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756219305; cv=none; b=lL0We5fhKHy3moQ2Tasy3iaig9M4NEVJYvWW02q6Q0ITAFaQXMIugjmOogYMARALklIEoEk5wznR5Yjc6Zs1oe/Jp3E5LL+a3uEhTJKoDR6/YwkK0VFAZTSJucvlZY2QsRYzxE93jrQyFVS97QdjlIrtmCV9z0w2VnioTlZwu+0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756219305; c=relaxed/simple; bh=GZnVsq+OZnxdgwsTOQ/JXLL/zNkregAfTuWUB97EFDE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hG5ogeFEKqwASuII9/zGsvzY739rotG8+5Z11z5Xe9KvT1ws/tThqX4+mmNIooCEt2sojQrtDGkAPxNXVOANrIkMaAnb07zXq0d+UtwOsONAAdekXnWGMdgU45A4a+scr61iUeuB55Bn3NcMV9by4jUgUSOzlclF8PQuUn64RR0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZKfzN32M; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZKfzN32M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7056AC4CEF1; Tue, 26 Aug 2025 14:41:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756219304; bh=GZnVsq+OZnxdgwsTOQ/JXLL/zNkregAfTuWUB97EFDE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZKfzN32MnoWVv6eXzVwN1taQy7BRPsYSPnWSc81oOGB8PTd3u4C07Q7YfEgIaSsfp Ch2CWAebzTkB/iRBXh5DP3x/nRuOw1Se72AGS2nqZsMknl9sb21wPpy36+CI7cuYWy Stxkt7hTbfTdMLlXCGqvw0jKOxuC8e/5iJUoavBw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Li Zhong , "Rafael J. Wysocki" , Teddy Astie , Yann Sionneau , Dillon C Subject: [PATCH 5.4 331/403] ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value Date: Tue, 26 Aug 2025 13:10:57 +0200 Message-ID: <20250826110915.977591643@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110905.607690791@linuxfoundation.org> References: <20250826110905.607690791@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Li Zhong commit 2437513a814b3e93bd02879740a8a06e52e2cf7d upstream. The return value of acpi_fetch_acpi_dev() could be NULL, which would cause a NULL pointer dereference to occur in acpi_device_hid(). Signed-off-by: Li Zhong [ rjw: Subject and changelog edits, added empty line after if () ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Teddy Astie Signed-off-by: Yann Sionneau Reported-by: Dillon C Tested-by: Dillon C Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/processor_idle.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1228,7 +1228,9 @@ static int acpi_processor_get_lpi_info(s status = acpi_get_parent(handle, &pr_ahandle); while (ACPI_SUCCESS(status)) { - acpi_bus_get_device(pr_ahandle, &d); + if (acpi_bus_get_device(pr_ahandle, &d)) + break; + handle = pr_ahandle; if (strcmp(acpi_device_hid(d), ACPI_PROCESSOR_CONTAINER_HID))